<span>The answer is implicit.</span>
Answer:
Group of answer choices During interval training, you're alternating between bursts of intense speed and periods of recovery.
and
As you change speed during your run, you're heart rate will be constantly rising and falling.
<span>Including all of the necessary parts of a book and putting them in the right order is the first step to making your book credible and professional. The inside of your book, which we call the book block, is divided into three main sections: the front matter, book block text, and back matter.</span>
D. because it's make Sence in that sentence
